I found this picture of a Gios mini velo and someone’s grandma. I’m pretty sure this is Taiwan and not Japan, so I guess that maybe these bikes are imported to Taiwan. Or maybe they never left Taiwan since I’m certain that these bikes aren’t made in Japan. Either way, Gios mini velos are much more common in Tokyo than Taipei.
Also, I’m a bit jealous if this grandma actually owns and rides that bike.